I believe in the possibility of loving narcissists if one accepts them unconditionally, in a disillusioned and expectation-free manner.
Narcissists are narcissists. Take them or leave them. Some of them are lovable. Most of them are highly charming and intelligent. The source of the misery of the victims of the narcissist is their disappointment, their disillusionment, their abrupt and tearing and tearful realisation that they fell in love with an ideal of their own making, a phantasm, an illusion, a fata morgana. This "waking up" is traumatic. The narcissist always remains the same. It is the victim who changes.
(From the book "Malignant Self-love: Narcissism Revisited" by Sam Vaknin - Click on this link to purchase the print book, or 16 e-books, or 2 DVDs with 12 hours of video lectures on narcissists, psychopaths, and abuse in relationships: http://www.narcissistic-abuse.com/thebook.html)